/* ==========================================================================
   章动咨询 · 新书发售（书籍列表 + 书籍详情）
   设计 token 继承自 h-col-136.css（--gold / --brown / --cream / --muted / --border）
   ========================================================================== */

/* ---------- 内页 Hero ---------- */
.page-hero {
  position: relative;
  padding: 168px 40px 84px;
  text-align: center;
  color: var(--cream);
  background:
    radial-gradient(ellipse 80% 70% at 50% -12%, rgba(200, 150, 62, 0.26), transparent 62%),
    linear-gradient(180deg, #2c1810 0%, #241109 100%);
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(200, 150, 62, 0.18) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 75%);
  pointer-events: none;
}
.page-hero .ph-inner { position: relative; z-index: 1; max-width: 860px; margin: 0 auto; }
.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 500;
  color: rgba(250, 248, 245, 0.55);
  letter-spacing: 1px;
  margin-bottom: 18px;
}
.breadcrumb a { color: rgba(250, 248, 245, 0.7); text-decoration: none; transition: color 0.2s; }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb .sep { opacity: 0.4; }
.breadcrumb .current { color: var(--gold); }
.page-hero h1 {
  font-family: 'Noto Serif SC', 'Noto Sans SC', serif;
  font-size: 52px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--cream);
  letter-spacing: 1px;
}
.page-hero h1 .gradient-text {
  background: linear-gradient(111deg, var(--gold) 5%, var(--gold-light) 55%, var(--gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.page-hero .ph-sub {
  margin-top: 18px;
  font-size: 16px;
  line-height: 1.7;
  color: rgba(250, 248, 245, 0.62);
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 章节容器 ---------- */
.section { padding: 100px 40px; max-width: 1200px; margin: 0 auto; }
.section-alt { background: var(--bg-alt); max-width: none; padding: 100px 40px; }
.section-alt .container { max-width: 1200px; margin: 0 auto; }
.container { max-width: 1080px; margin: 0 auto; }

/* ---------- CSS 书封面 ---------- */
.book-cover {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  background: linear-gradient(160deg, #3a2412 0%, #2c1810 42%, #180e08 100%);
  border-radius: 6px 12px 12px 6px;
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.28), inset 0 0 0 1px rgba(200, 150, 62, 0.28);
  padding: 44px 32px;
  display: flex;
  flex-direction: column;
  color: var(--cream);
  overflow: hidden;
}
.book-cover::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 9px;
  background: linear-gradient(180deg, rgba(200, 150, 62, 0.55), rgba(200, 150, 62, 0.08));
}
.book-cover::after {
  content: '';
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 40px;
  background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.28));
}
.book-cover-brand {
  position: relative;
  z-index: 1;
  font-size: 12px;
  letter-spacing: 4px;
  color: rgba(200, 150, 62, 0.95);
  font-weight: 600;
}
.book-cover-title {
  position: relative;
  z-index: 1;
  font-family: 'Noto Serif SC', 'Noto Sans SC', serif;
  font-size: 46px;
  font-weight: 800;
  color: var(--gold);
  line-height: 1.15;
  margin-top: 28px;
  letter-spacing: 2px;
}
.book-cover-sub {
  position: relative;
  z-index: 1;
  font-size: 15px;
  color: rgba(250, 248, 245, 0.88);
  margin-top: 14px;
  line-height: 1.5;
}
.book-cover-author {
  position: relative;
  z-index: 1;
  margin-top: auto;
  font-size: 13px;
  color: rgba(250, 248, 245, 0.72);
  letter-spacing: 2px;
}

/* ---------- 书籍详情：概览区 ---------- */
.book-overview {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 56px;
  align-items: start;
}
.book-info .book-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gold-dark);
  background: rgba(200, 150, 62, 0.12);
  border-radius: 100px;
  padding: 5px 16px;
  letter-spacing: 1px;
  margin-bottom: 18px;
}
.book-info h2 {
  font-family: 'Noto Serif SC', 'Noto Sans SC', serif;
  font-size: 34px;
  font-weight: 800;
  color: var(--brown);
  margin: 0 0 6px;
}
.book-info .book-subtitle { font-size: 18px; color: var(--muted); margin-bottom: 24px; }
.book-meta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 28px; }
.book-meta span {
  font-size: 14px;
  color: var(--brown);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 8px 18px;
}
.book-meta span b { color: var(--gold-dark); }
.book-desc { font-size: 15px; color: var(--muted); line-height: 1.9; margin-bottom: 28px; }
.book-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}
.btn-primary { background: var(--gold); color: var(--cream); box-shadow: 0 6px 18px rgba(200, 150, 62, 0.28); }
.btn-primary:hover { background: var(--gold-dark); box-shadow: 0 8px 24px rgba(200, 150, 62, 0.38); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--brown); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--gold); color: var(--gold); }

/* ---------- 三大数字卖点 ---------- */
.book-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; }
.book-stat {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 30px 26px;
  text-align: center;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.book-stat:hover { border-color: rgba(200, 150, 62, 0.5); box-shadow: 0 8px 28px rgba(0, 0, 0, 0.05); }
.book-stat .bs-num { font-family: 'Noto Serif SC', serif; font-size: 42px; font-weight: 800; color: var(--gold); line-height: 1; }
.book-stat .bs-label { font-size: 15px; font-weight: 600; color: var(--brown); margin-top: 10px; }
.book-stat .bs-desc { font-size: 13px; color: var(--muted); margin-top: 6px; }

/* ---------- 适用人群 ---------- */
.book-audiences { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.book-audience {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 28px;
}
.book-audience.audience-full { grid-column: 1 / -1; }
.book-audience h3 { font-size: 19px; font-weight: 700; color: var(--brown); margin: 0 0 6px; }
.book-audience .ba-tag { display: inline-block; font-size: 12px; color: var(--gold-dark); background: rgba(200, 150, 62, 0.1); border-radius: 100px; padding: 3px 12px; margin-bottom: 14px; }
.book-audience ul { list-style: none; margin: 0; padding: 0; }
.book-audience li { position: relative; padding-left: 24px; margin-bottom: 10px; font-size: 15px; color: var(--muted); line-height: 1.7; }
.book-audience li::before { content: '\2713'; position: absolute; left: 0; top: 0; color: var(--gold); font-weight: 700; }
.book-audience li:last-child { margin-bottom: 0; }

/* ---------- 章节目录 ---------- */
.book-toc { display: flex; flex-direction: column; gap: 14px; }
.book-toc-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 26px;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.book-toc-item:hover { border-color: rgba(200, 150, 62, 0.5); box-shadow: 0 8px 28px rgba(0, 0, 0, 0.05); }
.book-toc-no {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--cream);
  font-family: 'Noto Serif SC', serif;
  font-size: 17px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.book-toc-item h4 { font-size: 18px; font-weight: 700; color: var(--brown); margin: 0 0 6px; }
.book-toc-item p { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.6; }

/* ---------- 书籍列表卡片 ---------- */
.book-list { display: flex; flex-direction: column; gap: 24px; }
.book-card {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: center;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.book-card:hover { border-color: rgba(200, 150, 62, 0.5); box-shadow: 0 12px 36px rgba(0, 0, 0, 0.06); }
.book-card-cover {
  width: 100%;
  max-width: 240px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
  flex-shrink: 0;
}
.book-card-cover img {
  width: 100%;
  height: auto;
  display: block;
}
.book-card-body .bc-tag { display: inline-block; font-size: 13px; font-weight: 600; color: var(--gold-dark); background: rgba(200, 150, 62, 0.12); border-radius: 100px; padding: 5px 16px; letter-spacing: 1px; margin-bottom: 16px; }
.book-card-body h3 { font-family: 'Noto Serif SC', 'Noto Sans SC', serif; font-size: 28px; font-weight: 800; color: var(--brown); margin: 0 0 6px; }
.book-card-body .bc-sub { font-size: 16px; color: var(--muted); margin-bottom: 18px; }
.book-card-body .bc-desc { font-size: 15px; color: var(--muted); line-height: 1.85; margin-bottom: 24px; }
.book-card-body .bc-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.book-card-body .bc-meta span { font-size: 13px; color: var(--gold-dark); background: rgba(200, 150, 62, 0.1); border-radius: 100px; padding: 5px 14px; }

/* ---------- 按钮组 & 扫码购书弹出 ---------- */
.bc-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.qr-wrap { position: relative; display: inline-block; }
.qr-btn { cursor: pointer; }

.qr-popover {
  position: absolute;
  bottom: calc(100% + 18px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  z-index: 60;
}
.qr-wrap:hover .qr-popover,
.qr-wrap:focus-within .qr-popover {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.qr-popover-inner {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 20px 16px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.18);
  text-align: center;
  min-width: 208px;
}
.qr-popover-inner::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 8px solid transparent;
  border-top-color: #fff;
}
.qr-popover-inner img {
  width: 180px;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 6px;
}
.qr-popover-inner .qr-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--brown);
  margin: 14px 0 4px;
}
.qr-popover-inner .qr-hint {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}
.qr-popover-inner .qr-price {
  font-size: 22px;
  font-weight: 800;
  color: var(--gold-dark);
  margin: 6px 0 0;
  letter-spacing: 0.5px;
}

/* ---------- 读者社群 CTA ---------- */
.book-community {
  background:
    radial-gradient(ellipse 70% 100% at 50% 0%, rgba(200, 150, 62, 0.1), transparent 60%),
    var(--white);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 48px 44px;
  text-align: center;
}
.book-community h3 { font-family: 'Noto Serif SC', 'Noto Sans SC', serif; font-size: 26px; font-weight: 700; color: var(--brown); margin-bottom: 12px; }
.book-community p { font-size: 15px; color: var(--muted); margin-bottom: 20px; }
.book-community-tags { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 26px; }
.book-community-tags span { font-size: 14px; color: var(--brown); background: var(--bg-alt); border-radius: 100px; padding: 8px 18px; }
.book-community .book-cta { justify-content: center; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .book-overview { grid-template-columns: 1fr; gap: 36px; }
  .book-overview .book-cover { max-width: 260px; margin: 0 auto; }
  .book-stats { grid-template-columns: 1fr; }
  .book-audiences { grid-template-columns: 1fr; }
  .book-card { grid-template-columns: 1fr; gap: 28px; }
  .book-card-cover { max-width: 220px; margin: 0 auto; }
}
@media (max-width: 640px) {
  .page-hero { padding: 140px 20px 64px; }
  .page-hero h1 { font-size: 34px; }
  .section, .section-alt { padding: 60px 20px; }
  .book-cover { padding: 34px 24px; }
  .book-cover-title { font-size: 34px; }
  .book-card { padding: 28px 22px; }
  .book-card-body h3 { font-size: 24px; }
}